code: def test_identity_as_tensor(self):
      for v in (
          tf.constant([4.0, 3.0]),
          tf.Variable(0.0),
          deferred_tensor.DeferredTensor(tf.Variable(1.0), tf.math.exp),
          deferred_tensor.TransformedVariable(
              2.0, scale.Scale(tf.Variable(4.0))
          ),
      ):
          v_ = tensor_util.identity_as_tensor(v)
          self.assertIsNot(v, v_)
          self.assertIsInstance(v_, tf.Tensor)
  
imports: import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import scale
  from tensorflow_probability.python.distributions import normal
  from tensorflow_probability.python.internal import tensor_util
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.util import deferred_tensor
label_desc: Use image node_id 6 for calling the VariableTrackingUtils obj's underlying member method code with example usage: obj.test_identity_as_tensor() without return types